THE LARCH lappet: ITS FIRST AND SECOND STAGES. 91 



Thceggsarea glossy reddish-brown, broadly oval, somewhat flattened 

 upon their attached side, about 0.05 inch long, by 0.04 incli broad ; 

 the surface, under a magnifying power of lifty diameters, shows irregu- 

 lar hexagonal reticulations, of which the elevated lines are divided by 

 a fine impressed line. The shell is moderately thick. The larva eats 

 an opening in one end of sufficient size for its escape, but in some in- 

 stances a large })ortion of the shell IS subsequently eaten. The eggs 

 laid under my observation have been so covered with the anal hairs of 

 the moth as almost entirely to hide them from sight. Fig. 15 repre- 

 sents a cluster of them. 



The LarvsB in their First Stage. 

 The larva, on emerging from the (^gg, measures one-tenth of an inch 

 in length, is of a dull green color, with a black dorsal line. The head, 



shown in Fig. 10, enlarged to six diameters, is brown, crossed 

 @ centrally by a white horizontal line, another shorter one be- 

 _ ueath parallel to it, just above the mouth-parts, and two nearly 



Head of perpendicular ones on the superior front of the head, obsoletely 

 1 ar of united below by a curved line. Eows of tubercles traverse the 

 la'ricis ^^^Jf frot"^ which long hairs proceed, of which those of the first 

 in first geginent are longer than the body, and those on the terminal 



segment are as long as the body. The legs are long, and pro- 

 ject laterally — more conspicuously so when the caterpillar is walking. 

 Twelve of the larvEe died during this stage before attaining their first 

 molting. 'J'heir greatest length was one-fourth of an inch. This 

 stage was of varying duration, extending from sixteen to thirty-three 

 days. 



Second Larval Stage, 



The first molting comnieiiced on April 21st, and terminated on the 

 8th of May, extending over seventeen days — a considerable less range 

 than that shown in the hatching of the eggs (17:25). The following is 

 the record of the observed moltiiigs: 



April 21 2 larvae. Mav 2 3 larvae. 



" 22....^ 7 " "'3 1 larva. 



" 23 8 " " 5 2 larvae. 



" 24 5 " " 7 2 larvffi. 



*' 28 1 larva. " 8 1 larva. 



'< 29 1 " — 



33 larvae. 



On emerging from its first molt, the larva measured 0.3 inch. The 

 frontal lines of the head, before nearly perpendicular and parallel, now 

 converge below, resembling the letter U ; the brown portions, under a 



